Thread cutter and stop motion for weft-replenishing looms



1,637,217 July 1927' D. DACKMINE E 'IHREAD CUTTER AND STOP MOTION FOR WEFT REPLENISHING LOOMS Filed Jan. 30, 1926 readily applicable to the UNITED STATES PATENT OFFICE.

m DACIHINE AND HECTOR MONIER, F LEWISTON, MAINE. THREAD CUTTER AND STD? MOTIOIT I'OB- 'WEFT-REZPLENISHING LOOKS.

first: 1 7 "W" Application filed January 30, 1926. Serial No. 84,880.

threads of a single color, the weft replenishing mechanism being partly shown in patents numbered 1,366,949; 1,150,477 and 1,517,513. The thread cutter and stop motion made in accord with our invention is Crompton & Knowles weft replenishing looms.

In the accompanying drawings,-

Figure 1 is a plan view;

Figure 2 is a side elevation;

Figure 3 is a partial top view;

Figure 4 is a detail view;

Figure 5 is an end elevation;

Figures 6 and 7 are detail views; and Figure 81 is a plan view of a modification.

90 In reference to the drawings. BB refers to the breast beam; L the lay: SB the shut tile box; S the shuttle; b the bobbin or quill; MS the magazine support; SM the stop motion and FF the filling fork, all of which are of well known construction;

Our invention relates to a filling or weft threading mechanism which is constructed to provide an automatic stop motion, the rfilling thread being cut when the bobbin is a substantially exhausted, means being provided to hold the filling or weft thread which extends from the cutter to the selvage of the woven fabric; means beingalso provided to prevent the stopping of the loom when I the filling fork is moved into an inoperative position; likewise to provide a protecting device for preventing av smash-up caused by an improperly working shuttle.

Generallyspeaking, the object of the in- 4 vention is twofold: first, to provide thread cutting mechanism of simple construct-ion for use on weft replenishing looms which is connected with thetransfer mechanism. of the ma azine; and secondly, to provide a mechanlsm'of sim le construction combined with and a part 0, the thread cutting device which is provided with a stop motion which protects the mechanical parts of the cutting evice from breakage and also prevents a smash-up and injury to the Mom or shuttle,

due to improper lacing thereof. 1

The cutter stand 10 is provided with slots, through which pass bolts which may also be used for connecting the magazine stand to the breast beam. This stand 10 has formed integral therewith a. frame with apertures through the ends thereof for the passage of a shaft 12 which connects the frame 11 to a frame or box 13 having projecting end portions on oneside and intermediate projecting portions 14 and 1 5 on the opposite side. The shaft 12 is in alinement with a rocker, one end of which engages with a stop lever 16. The frame 13 carries a bar 17 and has through its laterally projecting portions a. rectangular opening and a circular opening for the tubular portion 18 of the bar 17. The frame 13 is also provided with an aperture for a rod 19 which is connected with an oscillatory blade or cutter 20. The shafts 12 and 18 pass through springs, as shown. The bar 17 is provided on its under side with a notch 21 and the frame 13 has maintained in oscillatory engagement therewith a latch 22, said latch having tension exerted thereon by a spring 23 which may be attached to the Referring to the bar 17, it will be noted 7' that it has 21 depending portion 25 located intermediately or between the notch with which the latch engages and its end and that one side of the forward end portion of the bar is cut away to provide a mouth 26. The reduced portion of the bar 17 carries plates 27 and 28, one of the plates being slightly convex to provide additional pressure againstthe cutter 20. The cutter has a beveled edge adapted to enga-ge with the plate 27 and a-tstem operating within a recess is pivotally attached to rod19 and to the forward portion of the side of thebar 17 which carries the plates 27 and 28. The rod 19 is encircled by a springand beyond the projecting portion of the frame 137 carries an adjustable stop 29.

When in operation, the filling detector mechanism indicates fora change of filling, and then actuates the latch rod 24 which is pulled upward from its normal position in the notch 21 and allows the bar 17 carrying the cutting mechanism, by reason of its spring, to .be projected towards the lay, the

move the blade of the cutting device, the

fillin thr'eajd beiiig severed by theblade operating between the plates 27 and 28 and holding the end of the thread WlllCll extends fronmlhesselvagep The blade of the cutter and the edge of the cutter being sn huyour of rontact, or by having La rounded or non-cutting edge, merely olainpsftheiportion of the thread beedge, and the plate yondf trhereit isput to hold the end which XQQDds froni thelselvage,

. "be caughtjmtheieoess or ,IAs the my; coht-inues its forward movenien't, it comesin :contact with the rigid depending portioir and moves the same ba'ok to "inoperative position where theflatch Wlll dtent, thus hold; ing back; the putting device lun til the next Qperatipn' 'Ilhej spri 11g attached to the pawl bring hackwthe; pawl in. "position on acts to eacl r operatlon 'ofthe sh aftmm ing forward between the 11 0i;baolnyard when the pawl is released; The returns to )IlOlDfiilfltlVe PQSltlOIl as soon as thevadjustinjg collar 29 leaves, the

lldrgOf the fi'amelj thej spring on thefrotl 19 blade QOVto lowered position has Q'TQ and 28, and releases foroesh the gutter the weft; thread ltthich eiltends from the sellefvage tof'theflypven fabric adjacent toi -the temple r tte (n te Q nX-u jllhenever the shuttle worksfiniproperly, ,zasgior instan gel, sfivhenjt fails to enter far enough i'n tl1e[slu1ttl,e boz rlot th'e loom, the end of the shuttle will stllfike againstthe endpf the mouth on the bar 17 and theeontilct will; push u back the bar 17, .Which will *unttil itqrests against its end, While: the, rear jen tLof the shaft ivill be; moved -rearwardly andoome in contact with the arm of the stop niotion to it bring r the loom: to a ,stop. I The -entire;device is: brought; to an inoperative ,whgen brou r e lpaxvl vill cateh in the llot l i i 'fi the b 1 7 insuchposition ar t-It slwill, belimderstooci f;oreg oin, g

lastsription that} 111116; devioei pr ovides .for

holding' the"? filling tl lleilglj which extends ,fronnthe selvage-pf thee-fabric and also for cutting thethread from the substantially exhatistedshuttle, and 'thatg thejunovement of i the li y ordinarily,rn ove s,I the barto severqthe threats n -mm the b ra 'y n he ea ter in aneinoperatire position, and in case of the; movement ofzthegfoutter by contact imithl the wrongly 1)ositioned';sl 1uttle,; the.

Qeonioal metal guarded vendj-Yof; the shuttle will-genter beteenAthe .j airs rand toree V the frame rearward tosaotuate the; stoplino tion. -1 12e mo ficatto sh w n th drawin -s Fig. 8, illustrates a change in constructlon ht toIan inopratire'po'sition, the

porting frame, a no'yable y flame, a s lida bar eonneeti,ng the, morab'le frames withhtlle. fi ed fr m mpr nt: -t e n st s'ba .a spring actuated cutterrbar as sociatell with which is adapted foruselfi' ithl ii hat may be struction of shuttle boxes and stop motions 1x11 l we :aayaml.:wi h this in;View;.t h cutten r h one 20 and the plate 28 conj oint lf prbfide a Youttirig'. or severing:

which isxintegral with awbaw'clep'el'l'cls from a point Where the bar is bent laterally. Vith termed 51112111 1001115 having :1 modified con- 7 this construction; the rod 19 is bent and encircled by a spring.

1. The eombination in a'thread outter and 'holdeiflfor weft replenishing looms, otja movable Carrier frame for a emitter Jan-51a 'outter bar' inaintainedin reciprocal engage; nient jifvith the 1 111111%; a spring whielil'en gages theeutter bar and the fraine a thread utter; pivoted on the cutterbargn rod which engages with the etltteighfls'pring and avert- 1) on the ro'dtfor engagement with the movable carrier franielja latch pivoted 011 the movable carrier frame for engagement Witlrtliefcutter bar, and means forreleasing thelatch operativoly c'oiiz1eeted"\\*itl1 the weft ishing mechaiiismof th e l'ooni. I In a device ofLtheeharacter setfolith, a movable supporting fraxile, a cutterlwbar maintained in slidableengagement-withsaid replen- 1 supporting frame, "a latch engaging the frame and the cutter bar "to holdthe cutter i bur retraeted, .a dependinggportiop omthe cutter bar which positioned to "be "engaged by the layl of the loomioinovethe cutter bar into latch engaging position saidfeutfi' bar also being adapted .to'he enga bit i1 misplaced shuttle and when; so ehg aged' to be positioned to aeumre a sto'p inotion ortht; 00m. g will 3.1 1 a device of the Character:fdeseribecl foif-zuseto provide weft holding and "cutting mechanism for loonis having a s'topjmotion,

a stationary frame attached: to e lmagazine stand of a weft'replenishing loo y a mow able fraine having i'slijdahle ass milated therewith. weft" thread cutting and holding: inechanismearried by one of the bxirfs, bars occupying a; position where they j mn'j' he moved i ntonormal automatio ioperatiiig position by the lay ofthe 16am and bey dnd thenorma'l operating Position. i theilay with; an, interposed shuttle to aet aze the. stop amu mr the loom ting fineehanisin; for automatic] weft replenishing' looms, and lthe stop, motion therethe movable frame, afw'eft thread eiitten-and Kit liolclerlmeanslfor moving theroutteninpo sh ,tion to hold vanclcutthe weft threa dgamod Iuttaohed to thm cutter, a spring whieh wi elesh qtwdmw e f i e iiiwee direction.

5. A weft cutting mechanism for weft replenishing looms comprising in combination a movable supporting frame, a cutter bar, a weft cutter pivoted to the cutter bar, a rod associated with a frame and with the cutter bar, a spring on the rod for holding: the same in position which will move its weft cutter to a position with its spring under compresslon, a latch for holding the cutter bar against movement, and a connection between the latch and the weft replenishing mechanism of the loom for releasing the latch to effect spring actuation of the cutter bar, an oscillation of the weft cutter, and a severance of the weft thread from a substantially ex hausted bobbin carried by a shuttle.

6. In a thread cutter for weft replenishing looms, a cutter bar supporting frame comprising a fixed section and a slidable section, a reciprocatory cutter bar carried by the slidable section, a spring on the cutter bar, a latch for holding the cutter bar against action by the spring thereon, means for releasing the latch connected with a movable part of the weft replenishing mechanism of the loom, a cutter pivoted to the cutter bar, and means attached to the cutter for engagement with the slidable section of the cutter bar supporting frame to actuate a thread cutter associated with the cutter bar, said thread cutter operating to effect a severance of the weft thread and to hold one end of the severed thread.

7. In a combined weft thread clamp and cutter for weft replenishing looms and the stop motion thereof, the combination of a cutter bar, a frame for holding the cutter bar in inoperative and operative position, a latch connected with weft replenishing mechanism of a loom, said latch being adapted to hold the cutter bar and its cutter in position to engage with a weft thread of a partially exhausted bobbin, oscillating means connected with the cutter bar to sever and to hold one end of the severed weft thread, and means on the cutter bar for engagement with a misplaced shuttle to move said cutter bar to a position to operate a stop motion of the loom.

8. In combination with weft cutting mechanism for replenishing looms, of a fixed support and a support maintained for movement at right angles to the length of the lay of a loom, said support being in slidable engagement with the fixed support, a spring actuated cutter bar carried by the movable support, a latch associated with the movable support for engagement and retention of the cutter bar, a connection between the latch and the replenishing mechanism of a loom to effect automatic release of the latch, an oscillatory cutting blade attached to the cutter bar, means attached to the cutter blade for actuating the same to weft thread holding position, and means for actuating the cutter blade to sever the weft thread when the cutter bar is released, said releasing mechanism being actuated when the shuttle of the loom contains a substantially depleted bobbin, and aprojection on the cutter bar for engagement with the lay of the loom for moving said cutter bar to position where the latch will hold the cutter bar in position for the next operation.

9. The combination in a weft replenishing loom having a stop motion and a shipper bar, of a frame maintained by the breast beam of the loom, a reciprocatory bar associated .with said frame, a reciprocatory frame carried by the bar, a spring operating in conjunction with the latter frame for projecting the bar, a latch carried by the movable frame, means for connecting the latch with a movable part of the shuttle magazine of the loom, said latch serving to hold the bar in normal position, the bar being provided on its under side with stepped depending portions so positioned relative to the shuttle box and lay of the loom that the lay will engage with one of the depending portions of the bar to effect normal movement of the bar and the higher step on the bar, and a misplaced shuttle serving to effect movement of the bar to release for effective operation the stop motion of the loom.

DESIRE DACKMINE. HECTOR MONIER. 

